Lafayette S. Foster graduated from Brown University and was admitted to the bar in both Maryland and Connecticut. He held multiple positions in the Connecticut House of Representatives, including Speaker, and served in the US Senate where he chaired the Committee on Pensions and acted as President pro tempore. Foster was known for his opposition to the Kansas–Nebraska Act and President Buchanan's military actions in Mexico.

Lafayette S. Foster's political identity is marked by an intriguing blend of moral rigidity and pragmatic governance. He fiercely opposed the Kansas–Nebraska Act, framing it as a moral transgression, yet he simultaneously navigated complex legislative roles during the Civil War, including acting as vice president. Foster's dedication to pensions and his support for the Committee on Pensions reveal a nuanced approach to economic policy. His educational contributions, including endowing academic prizes and professorships, further illustrate a commitment to intellectual advancement, albeit through a lens of personal moral conviction.